package vip.source.pattern.part05;

/** 懒汉模式(线程不安全) 空时加载 */
public class Singleton_01 {

    private static Singleton_01 instance;

    private Singleton_01() {}

    public static Singleton_01 getInstance() {
        if (null != instance) return instance;
        return new Singleton_01();
    }
}
